Given the fact that MS Security essentials is a consumer class AV product I doubt medium to large companies are rePlacing their enterprise AV software with it. NO central management, reporting, etc... With security essentials. What about firewall, IPS, app device control, etc...? Relying on only a signature based AV moving forward is a failure from the start.

MSSE is free so you get what you "pay" for so to speak.....and thatdude's post above pretty much sums it up when it comes to free AV products.

The one thing I will add is that if you are strictly relying on AV as your only line of defense, you're in some very serious trouble.

Also, ALL Antivirus products cannot catch everything out there. It's basically a race to the finish for who can write definitions the fastest and get them out. Many people on this forum like to claim Malwarebytes is far and away better than SEP. While I do use Malwarebytes/Hitman Pro as a second opinion scanner if SEP doesn't catch something, I have seen numerous times where Malwarebytes/Hitman Pro misses stuff that SEP catches. Unfortunately, signature based AV is starting to become a thing of the past. There are so many criminal groups out there hell bent on making money that their malware writing techniques are very advanced to the point where they can easily bypass AV.

I think you'll see good things in the new SEP coming out in the next few months, which is based on file reputation scanning.

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